Panasonic U-36LE1U6 Technical Data Manual page 30

2. System Design
Example:
Main tube of unit
1st branch
Unit distribution tube
●
Example of each tubing length
Main tubing
LA = 131 ft.
LB = 16 ft.
LC = 16 ft.
LD = 49 ft.
1
●
Obtain charge amount for each tubing size
Note that the charge amounts per 3.3 ft. are different for each liquid tubing size.
ø3/8" (ø9.52) → LA + LB + LC + LD
2
ø1/4" (ø6.35) →
Additional refrigerant charge amount is 147 oz.
3
CAUTION
4
5
6
7
8
LA
LB
1
model 7
Distribution joint tubing
Indoor side
1 = 16 ft. 4 = 20 ft.
2 = 16 ft. 5 = 16 ft.
3 = 7 ft.
1 + 2 + 3 + 4 + 5
Be sure to check the limit density
for the room in which the indoor
unit is installed.
L1
L2
LC LN
n
2 3 n–1
model 9 model 12 model 18
: 212 ft. × 0.602 oz/ft. = 127 oz
: 75 ft. × 0.279 oz/ft.
Total
2 - 20
Design of Mini VRF SYSTEM
model 18
= 20 oz
147 oz